22 Questions
The heart is the largest organ in the body.
False
The heart contains two muscular sections (chambers).
False
The main function of the heart is to pump blood throughout the body.
True
The endocrine system sends out electrical impulses to control heart rate.
False
The nervous system controls the rhythm and speed of heart rate.
True
The heart's chambers briefly hold blood before moving it due to mechanical pumps inside the heart.
False
The Sinoatrial (SA) node sends signals that make your heart beat.
True
The Left bundle branch sends electric impulses to your right ventricle.
False
Your heart is located in the back of your chest.
False
The Purkinje fibers make your heart atria contract and pump out blood.
False
Your heart looks like an upside-down pyramid with sharp edges.
False
On average, an adult's heart weighs about 10 ounces.
True
The thyroid gland can regulate the heart rate through hormones.
True
The heart walls consist of four layers: endocardium, myocardium, epicardium, and pericardium.
False
Blood vessels called capillaries carry oxygen-rich blood back to the heart.
False
The left atrium pumps oxygen-poor blood to the left ventricle.
False
The tricuspid valve is located between the left atrium and left ventricle.
False
The pulmonary valve opens when blood flows from the left ventricle to the aorta.
False
Coronary arteries supply blood to the heart itself.
True
The electrical conduction system of the heart controls the rhythm and pace of heartbeat.
True
The superior vena cava carries oxygen-rich blood from the upper body to the right atrium.
False
The inferior vena cava brings blood from the lower body to the left atrium.
False
Learn about the anatomy and function of the heart, the powerhouse organ responsible for pumping blood throughout the body. Explore the four muscular chambers and the role of electrical impulses in regulating the heartbeat.
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